I can recommend the DeArrow extension for this. It has an option to always show the untranslated title. Plus, it has the intended features such as thumbnail rep

I can recommend the DeArrow extension for this. It has an option to always show the untranslated title. Plus, it has the intended features such as thumbnail replacement and crowd-sourced titles. DeArrow works in Android Firefox. It's unfortunate that YouTube is only usable with these extensions, but here we are.